Sbaihat Layth, Takeyama Keiko, Koga Takeharu, Takemoto Daigo, Kawakita Kazuhito
Plant Pathology Laboratory, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa-ku, Nagoya 464-8601, Japan.
Plant Disease and Insect Control Group, Aichi Agricultural Research Center, Yazakosagamine, Nagakute 480-1103, Japan.
ScientificWorldJournal. 2015;2015:870520. doi: 10.1155/2015/870520. Epub 2015 Feb 24.
Tomato (Solanum lycopersicum) production relies heavily on the use of chemical pesticides, which is undesired by health- and environment-concerned consumers. Environment-friendly methods of controlling tomato diseases include agroecological practices, organic fungicides, and biological control. Plants' resistance against pathogens is induced by applying agents called elicitors to the plants and would lead to disease prevention or reduced severity. We investigated the ability of a novel elicitor extracted from the brown sea algae (Sargassum fusiforme) to elicit induced resistance in tomato. The studied elicitor induced hypersensitive cell death and O2 (-) production in tomato tissues. It significantly reduced severities of late blight, grey mold, and powdery mildew of tomato. Taken together, our novel elicitor has not shown any direct antifungal activity against the studied pathogens, concluding that it is an elicitor of induced resistance.
番茄（Solanum lycopersicum）的生产严重依赖化学农药的使用，而关注健康和环境的消费者对此并不满意。控制番茄病害的环保方法包括农业生态实践、有机杀菌剂和生物防治。通过向植物施用称为激发子的试剂来诱导植物对病原体的抗性，这将导致疾病预防或减轻病害严重程度。我们研究了从褐藻（羊栖菜）中提取的一种新型激发子在番茄中诱导抗性的能力。所研究的激发子在番茄组织中诱导了过敏细胞死亡和超氧阴离子（O2(-)）的产生。它显著降低了番茄晚疫病、灰霉病和白粉病的严重程度。综上所述，我们的新型激发子对所研究的病原体未表现出任何直接的抗真菌活性，得出结论它是一种诱导抗性的激发子。
